Among the following elements, the one that is not an actinoid is:

The period number in the long form of the periodic table is equal to : 

The elements in which electrons are progressively filled in 4f-orbitals are called:

The outermost electronic configuration of the last element of the p-block in the 6th period is represented by:

1. $7{\mathrm{s}}^{2}7{\mathrm{p}}^6$

2. $5{\mathrm{f}}^{14}6{\mathrm{d}}^{10}7{\mathrm{s}}^{2}7{\mathrm{p}}^0$

3. $4{\mathrm{f}}^{14}5{\mathrm{d}}^{10}6{\mathrm{s}}^{2}6{\mathrm{p}}^6$

4. $4{\mathrm{f}}^{14}5{\mathrm{d}}^{10}6{\mathrm{s}}^{2}6{\mathrm{p}}^4$

Among the following elements whose atomic numbers are given below, which cannot be accommodated in the present set up of the long periodic table?

The elements with atomic numbers 35, 53, and 85 are:

Among the following, the elements that can show covalency greater than 4 is/are:

(a) Be

(b) P 

(c) S

(d) B

Choose the correct option

1. (a), (d)

2. (b), (c)

3. (c), (d)

4. (b), (d)

Among the following sequences, the sequence contains atomic numbers of only representative elements is/are-

Choose the correct option

The properties among the following can be shown by the element belonging
to the 3rd period and group 13 of the periodic table.

(a) Good conductor of electricity

(b) Liquid, metallic

(c) Solid, metallic

(d) Solid, non-metallic

Choose the correct option

1. (a), (c)

2. (b), (c)

3. (c), (d)

4. (b), (d)